Calculation of shielding coefficient of grounded metal mesh under high voltage transmission lines by Iterative Charge Simulation Method

Solving the shielding factor of the grounding metal mesh to the electric field near the high-voltage transmission line can provide an important reference for the location selection and structure design of the grounding metal mesh. In this paper, the Iterative Charge Simulation Method is proposed to solve the shielding factor of metal mesh. Based on the Gauss Seidel iterative method, the solution procedure is constructed according to the different coupling relationship and coupling degree between physical quantities. Compared with the traditional Charge Simulation Method: 1. Each calculation only stores the self-potential-coefficient-matrix of transmission line units and metal network units, which means the storage of factor matrix is reduced from O((M+N)
²
) to O(M
²
+N
²
); 2. Since the coupling relationship of the transmission line units and the metal mesh units does not change with their relative positions, for the same metal mesh with different erection positions, it is only necessary to recalculate the mutual potential factor matrix between the transmission line units and the metal mesh units, which means calculation amount is reduced by (M
²
+N
²
) /(M+N)
²
; Numerical examples verify the correctness, accuracy and superiority of the proposed method.